WO1995030502A1 - Produits frittes a densite accrue - Google Patents

Produits frittes a densite accrue Download PDF

Info

Publication number
WO1995030502A1
WO1995030502A1 PCT/SE1995/000497 SE9500497W WO9530502A1 WO 1995030502 A1 WO1995030502 A1 WO 1995030502A1 SE 9500497 W SE9500497 W SE 9500497W WO 9530502 A1 WO9530502 A1 WO 9530502A1
Authority
WO
WIPO (PCT)
Prior art keywords
powder
process according
compacted
iron
lubricant
Prior art date
Application number
PCT/SE1995/000497
Other languages
English (en)
Inventor
Ulf Engström
Björn Johansson
Original Assignee
Höganäs Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Höganäs Ab filed Critical Höganäs Ab
Priority to MX9605512A priority Critical patent/MX9605512A/es
Priority to EP95919706A priority patent/EP0758934A1/fr
Priority to US08/969,542 priority patent/US5926686A/en
Priority to BR9507675A priority patent/BR9507675A/pt
Priority to JP52889395A priority patent/JP3792714B2/ja
Publication of WO1995030502A1 publication Critical patent/WO1995030502A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/14—Treatment of metallic powder
    • B22F1/148—Agglomerating
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/02—Making ferrous alloys by powder metallurgy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • B22F3/14—Both compacting and sintering simultaneously
    • B22F2003/145—Both compacting and sintering simultaneously by warm compacting, below debindering temperature

Definitions

  • the present invention concerns sintered powder- metallurgically produced sintered products having im ⁇ proved density. More specifically the invention concerns products prepared from iron or steel powders having the alloying elements diffusion-bonded to the iron or steel particles. These products are prepared by a warmcompac- tion process using high temperature lubricants.
  • CONFIRMATION COPY rials are obtained according to a process including the following steps: mixing an iron powder, a high temperature lubricant and optionally an organic binder; heating the mixture, preferably to a temperature of at least 120°C; transferring the heat powder composition to a die which is preheated to a temperature of preferably at least 120°C; and compacting the composition, at an ele- vated temperature of preferably at least 120°C. sintering the compacted body at a temperature of at least 1120°C; whereby the iron powder is a diffusion-bonded powder having one or more alloying elements diffused into the outer surfaces of unalloyed iron particles, and whereby the lubricant is added in one step.
  • the US patent 5 154 881 discloses metal composi ⁇ tions subjected to a warm compacting process. Compacted and sintered products prepared according to this patent exhibit improved densities and other strength properties and the advantages are obtained when the increased pressing temperatures are applied to iron based powders, which could be pure iron powders, mixtures of iron pow ⁇ ders with alloying elements or pre-alloyed iron powders.
  • the US patent 5 256 185 discloses a method for the preparation of a powder metallurgical product, wherein an iron powder, a lubricant and a binder are mixed, the mixture is compacted at an elevated temperature and the compacted body is subsequently sintered.
  • this patent concerns a method of lubricant addition, which enables suitable adjustment of the apparent density, either upwards or downwards, as decided, without significant effect on the flow rate. This is accomplished by the following steps: (a) provid- ing a dry admixture of an iron based powder, at least one alloying powder and a first amount of organic lubri- cant, (b) providing a liquid mixture of an organic bind ⁇ ing agent dissolved or dispersed in a solvent, (c) wet ⁇ ting the dry admixture with the liquid mixture, (d) re ⁇ moving the solvent thereby forming a dry powder composi- tion and (e) admixing a second amount of organic lubri ⁇ cant with the dry powder composition to form a metallur ⁇ gical powder composition.
  • the present invention includes only one lubricant addi- tion step. Furthermore, the present invention does not concern a method of manipulating the apparent density and thus the present invention concerns a quite diffe ⁇ rent problem than the problem which is solved by the in ⁇ vention disclosed in the US patent. Quite unexpectedly, it has now been found that in ⁇ creased densities and conc-equently improved mechanical properties can be obtained if the iron powder is a dif ⁇ fusion-bonded powder having one or more alloying ele ⁇ ments diffused into the outer surfaces of unalloyed iron particles.
  • Distaloy AB Distaloy AE
  • Distaloy SA Distaloy SE
  • H ⁇ ganas AB Sweden
  • These powders are all distinguished by a low carbon content, i e a carbon content below 0.01 % by weight.
  • the invention is further defined by the accompany ⁇ ing claims.
  • the high temperature lubricant is generally one which can withstand a compaction temperature up to about 370°C.
  • lubricants are molybdenum sul- phide, boric acid and those polyamide lubricants which are disclosed in the US patent 5 154 881 which is hereby incorporated by reference.
  • Particularly preferred are the commercially available lubricants ADAVA AX 450 or PROMOLD 450, polyamide sold by Morton International of Cincinnati, Ohio, which according to the US patent is an ethylene bis-stearamide having an initial melting point between about 200°C and 300°C.
  • lubricants which could be used are oligomers of "polyamide" type as de ⁇ scribed in our copending Swedish patent application 9401922-1 filed June 2, 1995 which is hereby incorpo- rated by reference. These lubricants may be used in com ⁇ bination with minor amounts, e.g. from 0.05 to 0.15% by weight, of conventional lubricants for cold-compaction, e.g. metal stearates, such as zinc stearate. The total amount of lubricant is 0.1-2, preferably 0.2-1% by weight of the composition.
  • the binding agent is preferably a cellulose ester such as those manufactured by Eastman Chemical products designated as CA, CAB and CAP resins. If present, the binding agent is used in an amount of 0.01-0.40% by weight of the composition.
  • the compacted specimens were sintered at 1120°C for 30 minutes in endothermic atmosphere with controlled carbon potential.
  • Green and sintered properties were analysed accord ⁇ ing to standard test methods, i.e. the green density according to ISO No 3927-1977 the green strength according to ISO No 3995-1977 the sintered density according to ISO No 3369-1975 and the tensile strength according to ISO No 2740-1973

Abstract

L'invention concerne des matériaux faiblement alliés obtenus par des techniques de métallurgie des poudres qui, après une seule compression et frittage au moyen de procédés et d'équipements utilisés dans la métallurgie des poudres classiques, présentent à la fois une résistance mécanique et une densité élevées avec une précision de tolérance inchangée. Une poudre de fer comprenant au moins un élément d'alliage lié par diffusion aux surfaces externes de particules de fer non alliées est utilisée comme matériau de base.
PCT/SE1995/000497 1994-05-09 1995-05-05 Produits frittes a densite accrue WO1995030502A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
MX9605512A MX9605512A (es) 1995-05-05 1995-05-05 Productos concrecionados que tienen intensidad mejorada.
EP95919706A EP0758934A1 (fr) 1994-05-09 1995-05-05 Produits frittes a densite accrue
US08/969,542 US5926686A (en) 1994-05-09 1995-05-05 Sintered products having improved density
BR9507675A BR9507675A (pt) 1994-05-09 1995-05-05 Produtos sinterizados tendo densidade melhorada
JP52889395A JP3792714B2 (ja) 1994-05-09 1995-05-05 改良された密度を有する焼結製品

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9401623A SE9401623D0 (sv) 1994-05-09 1994-05-09 Sintered products having improved density
SE9401623-5 1994-05-09

Publications (1)

Publication Number Publication Date
WO1995030502A1 true WO1995030502A1 (fr) 1995-11-16

Family

ID=20393966

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1995/000497 WO1995030502A1 (fr) 1994-05-09 1995-05-05 Produits frittes a densite accrue

Country Status (8)

Country Link
US (1) US5926686A (fr)
EP (1) EP0758934A1 (fr)
JP (1) JP3792714B2 (fr)
BR (1) BR9507675A (fr)
CA (1) CA2189973A1 (fr)
SE (1) SE9401623D0 (fr)
TW (1) TW340075B (fr)
WO (1) WO1995030502A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2150368A1 (es) * 1998-06-30 2000-11-16 Applic Metales Sinter Material compuesto de alta resistencia al desgaste y piezas desarrolladas con el mismo.

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9702466D0 (sv) * 1997-06-26 1997-06-26 Hoeganaes Ab Metal powder composition and a method for making sintered products
FR2766743B1 (fr) * 1997-07-29 1999-11-26 Sintertech Outillage de compression de poudre pour installation de frittage
US6280683B1 (en) * 1997-10-21 2001-08-28 Hoeganaes Corporation Metallurgical compositions containing binding agent/lubricant and process for preparing same
US6139598A (en) * 1998-11-19 2000-10-31 Eaton Corporation Powdered metal valve seat insert
US6326118B1 (en) 2000-09-05 2001-12-04 Xerox Corporation Surface alloyed cores for electrostatographic carriers and developers
US6872235B2 (en) * 2001-04-17 2005-03-29 Höganäs Ab Iron powder composition
US6755885B2 (en) 2001-04-17 2004-06-29 Hëganäs AB Iron powder composition
US20040151611A1 (en) * 2003-01-30 2004-08-05 Kline Kerry J. Method for producing powder metal tooling, mold cavity member
WO2010039342A1 (fr) * 2008-10-03 2010-04-08 Halliburton Energy Services Inc. Procédé et système de prédiction de performance d'un système de forage

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE334244B (fr) * 1965-09-14 1971-04-19 Hoeganaes Ab
DE2749215C2 (de) * 1976-11-03 1983-11-03 Höganäs AB, 26301 Höganäs Verfahren zur Herstellung eines kupferhaltigen Eisenpulvers
US5154881A (en) * 1992-02-14 1992-10-13 Hoeganaes Corporation Method of making a sintered metal component
SE468121B (sv) * 1991-04-18 1992-11-09 Hoeganaes Ab Pulverblandning innehaallande basmetallpulver och bindemedel av diamidvax och saett att framstaella blandningen
US5256185A (en) * 1992-07-17 1993-10-26 Hoeganaes Corporation Method for preparing binder-treated metallurgical powders containing an organic lubricant

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE427434B (sv) * 1980-03-06 1983-04-11 Hoeganaes Ab Jernbaserad pulverblandning med tillsats mot avblandning och/eller damning
US5108493A (en) * 1991-05-03 1992-04-28 Hoeganaes Corporation Steel powder admixture having distinct prealloyed powder of iron alloys
US5298055A (en) * 1992-03-09 1994-03-29 Hoeganaes Corporation Iron-based powder mixtures containing binder-lubricant
US5498276A (en) * 1994-09-14 1996-03-12 Hoeganaes Corporation Iron-based powder compositions containing green strengh enhancing lubricants

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE334244B (fr) * 1965-09-14 1971-04-19 Hoeganaes Ab
DE2749215C2 (de) * 1976-11-03 1983-11-03 Höganäs AB, 26301 Höganäs Verfahren zur Herstellung eines kupferhaltigen Eisenpulvers
SE468121B (sv) * 1991-04-18 1992-11-09 Hoeganaes Ab Pulverblandning innehaallande basmetallpulver och bindemedel av diamidvax och saett att framstaella blandningen
US5154881A (en) * 1992-02-14 1992-10-13 Hoeganaes Corporation Method of making a sintered metal component
US5256185A (en) * 1992-07-17 1993-10-26 Hoeganaes Corporation Method for preparing binder-treated metallurgical powders containing an organic lubricant

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2150368A1 (es) * 1998-06-30 2000-11-16 Applic Metales Sinter Material compuesto de alta resistencia al desgaste y piezas desarrolladas con el mismo.

Also Published As

Publication number Publication date
BR9507675A (pt) 1997-08-19
CA2189973A1 (fr) 1995-11-16
JP3792714B2 (ja) 2006-07-05
SE9401623D0 (sv) 1994-05-09
EP0758934A1 (fr) 1997-02-26
US5926686A (en) 1999-07-20
TW340075B (en) 1998-09-11
JPH09512863A (ja) 1997-12-22

Similar Documents

Publication Publication Date Title
AU666571B2 (en) Method for preparing binder-treated metallurgical powders containing an organic lubricant
CA2059323C (fr) Melange de poudre d'acier compose de poudres d'acier alliees distinctes d'alliages de fer
AU765581B2 (en) Improved method of making powder metallurgical compositions
MX2011006761A (es) Un metodo para producir un polvo a base de hierro o hierro aleado por difusion, un polvo aleado por difusion, una composicion que incluye el polvo aleado por difusion, y una parte compactada y sinterizada producida a partir de la composicion.
AU7465300A (en) Powder composition comprising aggregates of iron powder and additives and a flow agent and a process for its preparation
KR20070027758A (ko) 유동 강화제로서 탄소 블랙을 포함하는 분말 야금학적조성물
JPH0432122B2 (fr)
WO2002100581A1 (fr) Produits en acier inoxydable a densite elevee et procede de preparation correspondant
US5926686A (en) Sintered products having improved density
US4274875A (en) Powder metallurgy process and product
EP1737593A1 (fr) Lubrifiants pour compositions metallurgiques de poudre
US5217683A (en) Steel powder composition
CN100522420C (zh) 含有粘合润滑剂的金属粉末组合物及含有硬脂酸甘油酯的粘合润滑剂
EP0200691B1 (fr) Poudre mélangée à base de fer pour un alliage fritté
WO2001019508A1 (fr) Composite lubrifiant et procede de preparation correspondant
US6001150A (en) Boric acid-containing lubricants for powered metals, and powered metal compositions containing said lubricants
US5951737A (en) Lubricated aluminum powder compositions
WO1998025720A1 (fr) Poudres agglomerees a base de fer
WO2004038054A1 (fr) Procede de controle d'un changement dimensionnel au cours du frittage d'un melange en poudre a base de fer
CA2319830A1 (fr) Melange de poudre metallique destine a la metallurgie des poudres
US20030047032A1 (en) Method of producing powder metal parts from metallurgical powders including sponge iron
KR20090104140A (ko) 유동 강화제로서 탄소 블랙을 포함하는 분말 야금학적 조성물

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): BR CA CN JP KR MX PL RU US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 1995919706

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 1996 732471

Country of ref document: US

Date of ref document: 19961105

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 2189973

Country of ref document: CA

WWP Wipo information: published in national office

Ref document number: 1995919706

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 1997 969542

Country of ref document: US

Date of ref document: 19971113

Kind code of ref document: A

WWW Wipo information: withdrawn in national office

Ref document number: 1995919706

Country of ref document: EP